scholarly journals Water balance analysis on water management of organic System of Rice Intensification (organic-SRI) in West Java, Indonesia

2019 ◽  
Vol 14 (1) ◽  
pp. 17
Author(s):  
Chusnul Arif ◽  
Budi Indra Setiawan ◽  
Septian Fauzi Dwi Saputra ◽  
Masaru Mizoguchi
Keyword(s):  
Water Management ◽  
Water Balance ◽  
System Of Rice Intensification ◽  
West Java ◽  
Organic System ◽  
Sensor Parameter ◽  
Balance Analysis ◽  
Rice Intensification

Penelitian ini dilakukan untuk menganalisa efektifitas irigasi berselang dengan neraca air pada lahan SRI dengan penerapan pupuk organik. Eksperimen dilakukan di Desa Gabus Wetan, Kab. Indramayu, Jawa Barat dari 17 November 2016 sampai 1 Maret 2017. Sensor parameter cuaca dan tanah dipasang di lahan untuk mendapatkan data harian kondisi lapang termasuk pertumbuhan tanaman. Data cuaca seperti hujan, suhu udara, kelembaban udara relatif, dan kecepatan angin dan kedalaman muka air diukur secara otomatis setiap 60 menit. Analisis neraca air dilakukan dengan kesalahan (error) yang rendah (1,00%) dimana jumlah air masuk melalui hujan dan irigasi sebesar 560 mm dan 865 mm, sedangkan jumlah air keluar melalui evapotranspirasi tanaman, perkolasi, dan limpasan berturut turut sebanyak 430, 306 dan 675 mm. Perbandingan dengan sistem pertanian konvensional dengan irigasi tergenang, menunjukkan bahwa produktivitas air dari SRI organik berturut turut 30% dan 27% lebih tinggi untuk produktivitas air berdasarkan jumlah air masuk dan evapotranspirasi. SRI organik juga memproduksi 33% produksi lebih tinggi dari sistem pertanian konvensional di lokasi yang sama. Kunci keberhasilan irigasi berselang adalah dengan menjaga tinggi muka air dipermukaan tanah (macak-macak) pada fase vegetatif dan generatif. Oleh sebab itu, cara ini merupakan alternatif pilihan bagi petani ketika sumber daya air berkurang karena perubahan iklim. Diseminasi hasil direkomendasikan melalui program pelatihan dan pendampingan bagi petani.

scholarly journals PEMANFAATAN SUMBER DAYA AIR DAS YEH PENET SEBAGAI AIR IRIGASI DAN AIR BAKU PDAM

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
I Made Mudiasa ◽  
IG. B Sila Dharma ◽  
I Ketut Suputra
Keyword(s):  
Water Management ◽  
Water Balance ◽  
Water Availability ◽  
Irrigation Water ◽  
Water Demand ◽  
Water Source ◽  
Rotation System ◽  
Alternative Plan ◽  
Balance Analysis ◽  
Water Surplus

Abstract : Tukad Penet is one of the biggest rivers in Bali which is used to support farming and fresh water demand. The increasing of water demand in various sectors such as for irrigation and drink water recently using water from Yeh Penet source shows the over use of its water has caused some conflicts between the use of the water user for irrigation and another use. Therefore, it was needed to review the use of Yeh Penet water to see how big the potential of its water that could be exploited to support the water source demand. The optimal analysis of water usage was carried out in six regional irrigation (DI) used Penet river water such as DI Peneng, DI Kacangan, DI Luwuscarang Sari, DI Penarungan, DI Kapal and DI Munggu. This analysis was based on cropping, planting and water management as well as a maximum water raw demand of the regional company of drinking water (PDAM) in Tabanan and Badung regency. Based on the simulation result, water availability in each irrigation regional (DI) depended on the cropping and planting. It was needed to provide the planting and rotation system for some irrigation regionals in river fluctuation discharge. The deficit of irrigation water balance occurred in DI Peneng, DI Luwuscarang sari, and DI Kacangan. The optimal use of irrigation water in the third irrigation regional was carried out by using planting stimulation and water management. The water balance analysis result at watershed in the part of downstream Penet watershed showed the availability of water surplus occurred in alternative plan I and II. The water balance analysis showed water availability in alternative plan I of a minimum 0.04 million m3 and maximum 1.43 million m3, whereas in alternative plan II the wasted water availability of a maximum 0.25 million m3 and a maximum 1.51 million m3. The potential development of Penet watershed in alternative plan I was 0.67 million m3 (0.52 m3/sec) and in alternative plan II was 0.76 million m3 (0.58 m3/sec) was not able to support the total water demand in Badung and Tabanan regency. Besides, the water source development of Penet watershed only occurred in downstream part of Yeh Penet river to avoid some conflicts of water utilization in Penet watershed.

scholarly journals Thornthwaite-Mather water balance analysis in Tambakbayan watershed, Yogyakarta, Indonesia

2019 ◽  
Vol 280 ◽  
pp. 05007
Author(s):  
Adam Rus Nugroho ◽  
Ichiro Tamagawa ◽  
Almaika Riandraswari ◽  
Titin Febrianti
Keyword(s):  
Water Management ◽  
Water Balance ◽  
Water Demand ◽  
Annual Rainfall ◽  
Domestic Water ◽  
Current State ◽  
Management Plans ◽  
Balance Analysis ◽  
Water Management Plans ◽  
Downstream Area

Depok sub-district in Yogyakarta is one of the most populous areas, which also develops rapidly. The Tambakbayan watershed, which includes Depok sub-district, has been seen as one crucial watershed in Yogyakarta. This study conducted a Thornthwaite-Mather water balance analysis in the watershed in order to understand its hydrology capability. The result of the study on three stream areas of the watershed (upstream, midstream and downstream) shows that the dry months begins in May- June and ends in September-October. August tends to be the driest month in the year with total deficit value reaches 179.2 mm. Still, the annual rainfall is higher than the annual evapotranspiration. The results also show that the lower area of the watershed has a lower capability to preserve water. However, the watershed still sufficient in providing the domestic water demand in the current state. Comprehensive water management plans suggested to be applied to protect the watershed from overstressing the water resources, especially in the downstream area.

scholarly journals ANALISIS SPASIAL INDEKS KEKERINGAN DAERAH PANTAI UTARA (PANTURA) JAWA BARAT

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Ch Nasution ◽  
Djazim Syaifullah
Keyword(s):  
Water Management ◽  
Information System ◽  
Spatial Analysis ◽  
Water Balance ◽  
Water Deficit ◽  
Balance Analysis ◽  
Optimum Water

Spatial analysis for water deficit in Pantura was done for 16 rainfall stations average 13 year observations. Water balance computation was calculated with Thornthwaite-Matter method. Spatial analisys was done by Geographys Information System (GIS) with ArcInfo 3.5 and displayed by ArcView 3.3. Water balance analysis shown that water deficit was on June for most of all stations and reached maximum deficit on August. Water deficit was concentred around of Batujaya (bekasi District), Peundeuy (Karawang district), and around of Leuweungsemut (Indramayu district). These result of the analysis recommended to plan the optimum water management for maximize purpose of Jatiluhur Lake  Kata kunci : Analisis spasial, Thornthwaite-Matter neraca air, indeks kekeringan

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